package com.heima.app.gateway.filter;

import com.heima.app.gateway.utils.AppJwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * @author xiaoxiaode
 * @date 2021/9/24 16:38
 **/

@Component
@Slf4j
public class AuthorFilter  implements Ordered,GlobalFilter {


    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        // 获取request和response
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        // 判断是否是登录
        if(request.getURI().getPath().contains("/login")){
            return chain.filter(exchange);
        }
        // 获取token
        String token = request.getHeaders().getFirst("token");
        if(StringUtils.isEmpty(token)){
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            // 结束请求
            return response.setComplete();
        }
        // 判断
        try {
            Claims body = AppJwtUtil.getClaimsBody(token);
            int result = AppJwtUtil.verifyToken(body);
            if(result==1 || result==2){
                response.setStatusCode(HttpStatus.UNAUTHORIZED);
                // 结束请求
                return response.setComplete();
            }
        } catch (Exception e) {
            e.printStackTrace();
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            // 结束请求
            return response.setComplete();
        }
        return chain.filter(exchange);

    }



    /*
    * 值越小,越优先执行
    * */
    @Override
    public int getOrder() {
        return 0;
    }
}
